Apparatus for inserting bristles in rubber pads



W. T. SHERMAN.

APPARATUS FOR INSERTING BRISTLES IN RUBBER PADS.

APPLICATION FILD OCT. 231, !919. 1,355,278. Patented Oct. 12,1920.

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WILLIAM '1. SHERMAN, OF TROY, NEW YORK, ASSIGNOR TO HENRY T. HUGHES CO.INC., 01" NEW YORK, N. Y., A. CORPORATION OF NEW YORK APPARATUS FORINSERTING BBISTLES IN RUBBER PADS.

Specification 01' Letters Patent.

Patented Oct. 12, 1920.

Driglnal application filed November 13, 1918, Serial No. 130,958.Divided and this application filed October 28, 1919. Serial No. 332,718.

T 0 all whom it ma concern:

Be it known t at I, WILLIAM T. SHER- MAN, a citizen of the UnitedStates, residing at Troy, county of Rensselaer, and State of New York,have invented new and useful improvements in Apparatus for InsertmBristles in Rubber Pads, of which the fa lowing is a specification.

Reference may be had to the accompanying drawings, and the referencecharacters marked thereon, which form a part of this specification.Similar characters refer to similar parts in the several figurestherein.

This application is a division of an application filed by me November13', 1916, Serial No. 130,953, for improvements in inserting bristles inrubber pads.

This invention relates to the manufacture of bristle-supporting rubberpads suitable for use in hair brushes and the like.

In such pads the bristles are inserted separately or in groups of two ormore through small a ertures in the pad, the inner ends of the ristlesbeing provided with heads or oflsets which are covered in some suitablemanner with a backing-sheet, whereby the bristles are permanentlymounted in the rubber pad.

The present invention relates more particularly to inserting thebristles through the apertures in the rubber pad.

The principal object of the invention is to simplify and cheapen theoperation of inserting the bristles in the .apertures in the rubber pad.

Other ob'ects will appear in connection with the following descrlption.

Figure 1 of the drawings is a plan view of one of the rubber padsperforated preparatory to having the bristles inserted therein.

Fig. 2 is a vertical cross-section of the lower clamp-plate resting upona suitable support.

Fig. 3 is a similar section of the rubber pad shown in Fig. 1.

Fig. 4 is a similar section of the upper clamp-plate.

Fig. 5 is a similar section of the plate carrying the bristle-guidingtubes.

Fig. 6 is a similar section showing the rubber pad applied to the lowerclampplate, shown in Fig. 2.

Fig. 7 is a similar section showing the upper clam -plate su erim osed uon the rubber pas, as shown in Fi 6. p

Fig. 8 is a similar sectlon showing the plate having the bristle-guidingtubes superimposed u on the upper clamp-plate, as shown in ig. 7, withthe respective tubes inserted through the flaring apertures in the upperclamp-plate, and the apertures in the pad, into the correspondingopenings in the lower clamp-plate.

Fig. 9 is a view similar to Fig. 8, showing the bristles insertedthrough the tubes.

Fig. 10 is a similar section with the bristle-guiding tubes withdrawnleaving the bristles inserted in the apertures in the rubber pad.

1Fig. 11 is a plan view of the upper clampp ate.

Fig. 12 is a View in cross-section of the rubber pad after the bristleshave been inserted in the apertures in the pad.

Referring to the drawings wherein the invention is shown in preferredform, 1 is a pad of soft vulcanized rubber or the like, provided with aseries of perforations, 2, each adapted to receive and closely fit asingle bristle or a group of two or more bristles as may be desired.

My improved apparatus for inserting bristles in the apertures, 2, in thepad, 1, comprises a lower clamp-plate, 3, an upper clamp-plate, 4, and aplate, 5, carrying a series of bristle-guiding tubes, 6.

The lower clamp-plate, 3, is adapted to rest upon a suitable support, 7leaving beneath the clamp-plate a free space, 8, into which the lowerends of the bristles may extend. This lower clamp-plate is provided witha series of openings, 9, corresponding in number and location with theperforate openings, 2, in the rubber pad, 1.

The upper clamp-plate, 4, is provided with,

a series of perforations, 10, corresponding in number and location withthe openings,

9, in the lower clamp-plate and the perforar tions, 2, in the rubberpad.

The plate, 5, carries a series of bristleguiding tubes, 6, correspondingin number and location with the openings, 9, in the lower clamp-plate,apertures, 2, in the rubber pad, and apertures, 10, in the upperclamp-plate.

The apertures, 10, in the upper clamppad plate are preferably made toflare outwardly as shown, their outer ends bein of a diameter to freelyreceive and guide the respective tubes, while their inner ends are of adiameter which closely fits the tubes.

The 0 enings, 9, in the lower clamp'plate, 3, are 0 substantially thesame diameter as the smaller ends of the apertures, 10, 1n the upperclamp-plate.

he apertures, 2, 1n the rubber pad are somewhat smaller in diameter thanthe tubes, 6; and the ends of the tubes, 6 may be slightly tapered orrounded to fac litate their passage through the apertures, 2, in the Themanner in which the agaratus used in inserting bristles in rub r pads 1sas follows 0 The rubber pad, 1, is superimposed upon the lowerclamp-plate, 3, with t e perforations, 2, of the pad in alinement withthe respective openin 9, in the lower clampplate, as shown in 1g. 6. Theupper clampplate, 4, is then superimposed upon the rubber pad with theperforations, 10, of the upper clamp-plate in alinement with therespective perforations, 2, 1n the rubber pad, as shown in Fig. 7.

For convenience in alining the apertures and openings the lowerclamp-plate, 3, is preferably provided with two or more u wardly proecting guide-pins, 11, and t e rubber pad and the upper clamp-plate areprovided with correspondingly located apertures, 12, adapted to receivethe respective guide-pins, 11, whereby when the clamplates and pad areamembled, as shown in Figs. 7, 8 and 9, the apertures 1n the pad will bealined with the respective apertures in the upper clamp-plate and therespective openings in the lower clamp-plate.

After the rubber pad has been clamped between the clamp-plates, 3 and 4,as shown in Fig. 7, the plate, 5, is superimposed upon the upperclamplate, 4, with its tubes, 6, inserted through t e respective flaringapertures, 10, in the upper clamp-plate, 4, and the respectiveapertures, 2, in the pad into the res ctive openings, 9, in t e lowerclamp-p ate, as shown in Figs. 8, 9 and 10.

In thus inserting the bristle-guiding tubes, 6, they are forced throughthe somewhat smaller apertures 2, in the rubber pad, the yielding natureoi the rubber permitting the apertures to temporarily enlargesufficiently for this purpose. The ends of the tubes are of such sizeand form as to readily enter and expand the respective apertures, 2, forthe purpose stated.

As the rubber pad ofiers more or less resistance to the assage of thetubes, 6, therethrough, I pre or to make the tubes of different lengths,so that they will enter the pad successively and not all at the sameinstant.

After the tubes, 6, have been inserted in the rubber ad in the mannerabove described, brist es are inserted through the respective tubes, 6,by hand or by suitable apparatus, each tube receiving a single bristleor a grou of two or more bristles, as may be desire The tubes protectthe bristles from contact with the walls of the perforations 2, in therubber pad permittin the bristles to be inserted with practical y noresistance. 7

After all of the tubes, 6, have been supplied with bristles the plate,5, is removed, withdrawing the tubes, 6, and leaving the bristlesinserted through the a ertures, 2, in the rubber pad, as shown in Fig.10. As the tubes are gradually withdrawn from the respective apertures,2, in the rubber pad the elasticity of the rubber causes the apertures,2, to contract and closely engage the respective bristles.

fter the plate, 5, with its tubes, 6, has been removed, the upperclamp-plate, 4, is removed.

The bristles are of such length that when the upper clamp-plate, 4, isremoved the upper ends of the bristles project a suflicient distanceabove the "rubber pad to permit said ends to be bent over at rightangles, as shown at 14, in Fig. 12, or otherwise headed, to prevent thebristles from bein withdrawn downwardly through the pa After thebristles have been inserted in the pad in the manner above set forth,the pad may be com leted in any known manner as by cementing orotherwise securing upon the back of the pad a flexible backing-sheet,15, of fabric, rubber or the like, which covers the heads of thebristles and prevents the bristles from backing out through theapertures in the pad.

For certain purposes of the invention the guiding-plate, 4, may beomitted and the tubes, 6, may be forced directly through the aperturesin the rubber pad, this being possible, due to the support afl'orded tothe rubber pad by the plate, 3.

What I claim as new and desire to secure by Letters Patent is- 1. Incombination, in an apparatus for inserting bristles in rubber pads, apair of plates adapted to receive between them a rubber pa one of saidplates being provided wlth a perforation, and the other with an openingopposite said perforation, and a bustle-guiding tube removablyinsertible through said a erture in the one late, and throu h a rub rpad interpose between tllle p ates, into said opening in the other pate.

2. In combination, in an apparatus for insorting-bristles in rubber ads,a pair bf clamp-plates adapted to hol between them a rubber pad, one ofsaid clam -plates bein provided with a series of pa orations, an

the other with openings opposite said respective perforations, and athird plate having a corresponding series of bristle-guiding tubesremovubly insertible through the respective apertures in the oneclamp-plate, and through a rubber pad interposed between saidclamp-plates into the said openings in the other clamp-plate.

3. In combination, in an apparatus for inserting bristles in rubberpads, a pair of clamp-plates adapted to hold between them a rubber pad,one of said plates being provided with a series of outwardly flaringperforations, and the other with openings opposite said respectiveperforatlons, and a third plate having a corresponding series ofbristle-guiding tubes removably insertible through the respectiveflaring a ertures in the one clamp-plate, and throug a rubber padinterposed between the clamp-plates into the corresponding openings inthe other clamp-plate.

In testimony whereof, I have hereunto set my hand this 20th day ofOctober, 1919.

WM. T. SHERMAN.

It is hereby certified that the name of the essign ee in Letters PatentNo. 1,355,278, granted October 12, 1920, upon the application ofWilliexin T. Sherman, of Troy, New York, for an improvement in Apparatusfon Inserting Bristles in Rubber Pads, was erroneously written andprinted as Hem-3' 'I. Hughes Co. Inc.," whereas said name should havebeen written and printed as Henry L. Hughes 00. Inc., as shown by therecords of assignments in this office; and that the said Letters Patentshould be read with this correction therein that the same may conform tothe record of the case in the Patent Ofliee.

Signed and sealed this 30th day of November, A. D., 1920.

' L. B. MANN,

[eEALJ 4 Acting C'mnmiuionu of Patents.

